Supplement to this topic: Cisco 8831 conference phone displaying incorrect time
<tzdata>
<tzolsonversion>2017b</tzolsonversion>
<tzupdater>j9-tzdata.jar</tzupdater>
</tzdata>
Need to insert in the <device>
block<olsonTimeZone>Asia/Yekaterinburg</olsonTimeZone> in the <dateTimeSetting> block
j9-tzdata.jar - is taken from cucm-11.5 ( easy to be on torrent) . Is placed in the root of the TFtpd server. Should be downloaded by the speakerphone.
<timeZone>West Asia Standard Time</timeZone> - stops working, so it can be any.
<olsonTimeZone>Asia/Yekaterinburg</olsonTimeZone> - you can view the name options in j9-tzdata.jar. It opens as a simple archive.
the result looks like this
<device>
<fullConfig>true</fullConfig>
<deviceProtocol>SIP</deviceProtocol>
<sshUserId>cisco</sshUserId>
<sshPassword>cisco</sshPassword>
<tzdata>
<tzolsonversion>2017b</tzolsonversion>
<tzupdater>j9-tzdata.jar</tzupdater>
</tzdata>
<devicePool>
<dateTimeSetting>
<dateTemplate>D/M/Y</dateTemplate>
<timeZone>West Asia Standard Time</timeZone>
<olsonTimeZone>Asia/Yekaterinburg</olsonTimeZone>
<ntps>
<ntp>
<name>NTP Server</name>
<ntpMode>Unicast</ntpMode>
</ntp>
</ntps>
</dateTimeSetting>